Safety Eric Reid knows a long-term deal to remain with the 49ers depends on how he fares this season, in his third system in three years.

Earlier this month, the 49ers picked up Reid’s fifth-year option on his rookie contract for 2017 ($5.68 million salary). His long-term security, however, remains in flux.

“That’s business, isn’t it?” Reid said after Wednesday’s organized team activities. “You look at any form of business, not just football, and they want to see production.

“I haven’t had that conversation with them. But it’s obvious to me they want to see something.”

Personnel turnover and the implementation of a new scheme resulted in breakdowns throughout the defense last year as the 49ers struggled to a 5-11 record. Reid is optimistic about this season’s potential turnaround.

“I think I like this one the best. It just makes sense,” Reid said of the system. “When you line up and get a call, I know exactly what I’m doing and exactly what the guy next to me is doing. when you feel that way, you can be confident about the way you break on the ball.”

The guy next to Reid is Antoine Bethea, who’s recovered from last season’s pectoral tear. Bethea played in a similar defensive scheme his final two years with the Indianapolis Colts before joining the 49ers in 2014.

Reid said he’s amazed how quickly Bethea can make the calls on the field in new defensive coordinator Jim O’Neil’s system.